375389769721 has 2 divisors, whose sum is σ = 375389769722. Its totient is φ = 375389769720.

The previous prime is 375389769697. The next prime is 375389769739. The reversal of 375389769721 is 127967983573.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200990822400 + 174398947321 = 448320^2 + 417611^2 .

It is an emirp because it is prime and its reverse (127967983573) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 375389769721 - 2⁷ = 375389769593 is a prime.

It is a super-2 number, since 2×375389769721² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (375380769721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187694884860 + 187694884861.

It is an arithmetic number, because the mean of its divisors is an integer number (187694884861).

Almost surely, 2^375389769721 is an apocalyptic number.

It is an amenable number.

375389769721 is a deficient number, since it is larger than the sum of its proper divisors (1).

375389769721 is an equidigital number, since it uses as much as digits as its factorization.

375389769721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120022560, while the sum is 67.

The spelling of 375389769721 in words is "three hundred seventy-five billion, three hundred eighty-nine million, seven hundred sixty-nine thousand, seven hundred twenty-one".